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            <h1>今日待办</h1>
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                <p>例如：下周一出去唱K</p>
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                <button class="button">+ 新建待办</button>
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                <div class="layout-three-th">
                    <h3>学习CSS3动画</h3>
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                    <img src="images/3.JPG">
                    <p>2021年11月22日截止</p>
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                    <h3>学习使用CSS3网格布局</h3>
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                    <p>2021年11月22日截止</p>
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            <div id="layout-3">
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                    <img src="images/2.JPG">
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                <div class="layout-three-t">
                    <h3>学习使用CSS3+JS实现轮播图</h3>
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                <div class="layout-three-f">
                    <img src="images/3.JPG">
                    <p>2021年11月22日截止</p>
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